You don't have to have 20's to clear the Brembo's. Hell, Bogart and Weld make 17" wheels that will clear them. Our stock 19's will not clear them without spacers though, and our tires are about an inch shorter than the Camaro.
'09 PSM G8 GT w/ Premium & Sport packages.
Go: LSX 428 stroker, Manzo 2" Camaro LTs, Kooks 3" mids, GXP axle backs, VCM OTRCAI, RCR AirRam intake & ported TB, PRC CNC LS3 heads w/ LS9 valvetrain, 100mm LS7 MAF, 3.27 gears, Circle-D 3200 stall. Tuned by Me.
Whoa!: CTS-V/ Camaro 4-piston Brembos, Hawk pads, DBA rotors, full Zeta II front and rear suspension swap w/ BMR goodies and BC coil-overs.
Show: LED headlights and fogs, VG Sharkfin, GXP diffuser, 10% tint, de-badged, polished CTS-V wheels.